Traction grip



Dec. 5, 1950 H. J. TSCHOHL ET m.

IRACTION GRIP Filed Ost. 50, 1946 HARRY J- TSCHOHL EARL M. HANSON W} Patentecl Dec. 5, 1950 TRACTION GRIP Harry J. Tschohl and Earl M. Hanson, Mankato, Minn.

Applieation October 30, 1946, Serial N0. 706,626

1 Claim. 1 4 This invention relates to traction grips for automobile tires.

The usual type of traction grip I;akes a strapon form Which completely transversely encircles automobile, whioh has very limited ground clearance and 1imited clearance between the tire periphery and the fender and has small, narrow openings adjacent to the rim through Which the said strap must be threaded.

II: is an object of Iahe present invention to provide a novel and improved traction grip of cheap and simple construction which can be easily clipped onto a tire casing mounted on any type wheel including a full disc-type wheel.

The objectg of the invention will more fully appear from the following description made in connection With the accompanyin drawlngs wherein like reference characters refer to the same or similar parts throughout the various views and in which:

Fig. 1 is a general perspective view illustrating a number of tractin grips made in accordance with one embodiment 0f the invention as applied on a tire casing, mounted on a wheel.

Fig. 2 is a perspeetive view illustrating a. traction grip of the type shown inFig. 1.

Fig. 3 is a side elevation of the same traction gr1p.

Fig. 4 is a cross-sectional view taken through a tire equipped automobile rim showing the same traction grip applied about the tire casing; and

Fig. 5 is a perspective view showing an alternative form of traction grip of the invention.

There is shown in I;he drawings an automobile whee1 6 having a fianged rim I and having appliea thereto a tire casing 8.

For use in obtaining additional traction for the tire casing 8, there is provided, in accordance with the form of I;he invention illustrated in Figs. 1 I:o 4 inclusive, a traction grip designated as an entirety by the letter A. This traction grip is in the form of two spring clips 9 made as from spring strap steel and having a U-shaped form I;o closely embrace the tire casing 8 and having spring arms 9a provided with outturned, flared adapted -120 tightly and resiliently embrace the side walls 8a of the tire casing 8, the arms 9a of the tire Clips 9 being of such length as 1:0 terminate substantially adjacent the rim I. Attached to the arms 9a of these two spring clips are two cross-members I I made as from strap steel. These cross-members II serve both to hold the spring clips in a radially converging position and to provide an anchor for the ends of traction cross chains I2. Attached by their ends to said cross-members I I are two traction cross chains I2, which are adapted to fit about and tigholy embrace the tire casing 8.

For use in obtaining additional traction for said tire casing 8, the said traction grip A is merely snapped over the tire casing 8, the diverging fiared end portions II] of the clips 9 permitting of ready attachment. When the grip A is thus applied, the arms 9a of the clips 9 extend along radii of the wheel 6, and the traction chains I2 and clips 9 are held tightly about the tire casing 9 solely by the frictional force exerted between the arms 9a of the spring clips 9 and the side walls 8a of the tire casing 8. More than one of these traction grips A can be attached 120 tirecasing 8 to obtain still more traction. The spring pressure cf the arms 9a of the clips 9 gripplng the tire cause the clips Iso maintain their position on the tire against centrifugal force even when the wheel equipped with th.e grip A is driven at high speed.

There is shown in Fig. 5 an alternative form of traction grip, designated as an entirety by the letter B, whioh may be employecl in plane of the traction grip A.

Traction grip B is in the form of a single spring clip I3 of the same shape and material as used for the clips 9 of the traction grip A. Attached to the arms I3a of the spring clip I3 are two cross-members I4, one attached to each arm I3=a of said clip I3, and these cross members extend laterally well beyond the sides 015 the arms I3a. Near the ends of said cross members I I, the ends of the traction chains I5 are attaehed and anchored, I;he chains I5 being similar Io II;he traction chains I2 used in traction grip A.

The operation of said traction grip E is quite similar to that of traction grip A except that the traction grip B is held tightly about tire casing 8 by only a, Single spring clip I3 instead of by double spring clips 9 as in the case of traction grip A.

II; will be seen that an effective traction grip has been provided in either type A or type B end portions III. The arms 9a of the c1ips 9 are which will eliminate a considerable portion of the labor required in attaching a traction device about on1y a. part of the periphery of a tire casing.

It will be understood that changes may be made in the form, details, arrangement, and proportions of the various parts without departing from the scope of the present invention, which generally stated cqnsigts in the matter shown and described 1id{se forth in the ppendad dann.

A traction grip comprising two spaced substantially U-shaped individual spring clips adaptedto resiliently embrace a tire casing mounted 011 a wheel, each c1ip including an intermediate portion and a pair 0f opposed spring claxmping arms integrally formed therewith and said arms forrfring the so1e clamping means fo: holding saicl traction grip on said ti1e casing, the adjacenb arms of the respective c1ips converging inwardly so that when applied the arms of the c1ips extend radially relative 110 the wheel, cross-mezrlbers ex- REFERENCES CITED 'Ihe following references are of record in the file c f this patent:

UN ITED STATES PATENTS Number Name Date 559,958 Terry .13 May 12, 1896 1,101198 Lashar June 23, 1914 2,11944'7 Stahl et a1 May 31, 1938 2154047 Krider Apr. 11, 1939 2,315838 Bryon m... Apr. 6, 1943 

